code: def add_word(self, word):
      if word not in self._freq_dict:
          self._freq_dict[word] = 0
      self._freq_dict[word] += 1
  
imports: import logging
  import json
  import numpy
  from collections import OrderedDict
  from .None import ontology
label_desc: Use image node_id 3 for calling the Vocab obj's underlying member method code with example usage: obj.add_word(word) without return types